Typewriting machine



Obi; 6, 1931. KuRowsKl' 1,825,743

TYPEWRITING MACHINE Original Filed March 15, 1924 ATT NEY Patented Get. 6, 193i entree stares a r FFHQE ALFRED G. F. KUROWSKI, OF BROOKLYN, NEW YORK, ASSIGNOR TO UNFERWUQD ELLIOTT FISHER COMPANY, OF NEW YORK, N. Y., A CORPORATION OF DELAWARE TYPEWRITING MACHINE Original application filed March 15, 192%, Serial No. 699,420. Divided and. this application filed November 13, 1926. Serial No. 148,286.

This invention is an improvement in type writing machines, and with respect toits more specific features, in machines having typing systems tilted to hold the type-bars in printing position.

A feature of the invention is to provide, in typewriting machines having typing systems tilted to hold the type-bars inclined in printing position, connections between the main my frame and the carriage-shift-frame, such as will guide the carriage to shift parallel with the plane of the type-faces in printing position.

Another feature is to provide connections of the character above mentioned, such that the shift-frame may be adjusted with respect to the main frame to truethe ends of the platen or to bring the platen printing line I into the printing plane of the type-faces and maintained in such position.

This application is a division of my application, Serial No, 699,420, filed March 15, 1924, which matured June 12, 1928, into Patent 1,673,687.

Other features and advantages will hereinafter appear.

In the accompanying drawings,

Figure 1 is an end elevation of the carriage, with parts of the shift-frame and main 39 frame broken away.

Figure 2 is a plan view of the stationary shift rails with parts in section.

Figure 3 is an enlarged transverse vertical section of the races. 5

Figure 4 is a rear elevation of the main frame side plate at the left.

Figure 5 is a sectional view of Figure 4.

Figure 6 is a side View of the truck, with parts in section.

Figure 7 an end View of Figure 6.

Figure 8 is a section on the line X of Figure 6.

The present embodiment of the invention is shown in connection with a typewriting machine of the character forming the subject-matter of my co-pending application,

No. 697 ,476, filed March 7, 1924, which matured June 12, 1928, into Patent 1,673,289,

wherein is shown and described a typewriting machine having a typing system tilted rearwardly, so that the type-bars are inclined rearwardly in printing position, and the printing plane of the type-faces is correspondingly inclined.

The machine includes a main frame having side plates 10, each of which is provided with an inwardly-extending lug l1, and a type-segment 12 is secured to the lugs. Referring to Figures 1 and 2, it-will be seen that the plane of the lugs inclines rearwardly toward its top, and the segment is inclined in the same manner. The carriageshift-frame includes end plates 13 suitably connected, and each plate is sup orted by a pair of links or arms 1 and 1 the links pivoted at one end to the main frame, and at the other to the shift-frame. Each pair of links is substantially arallel, and the links are oblique, the pivotal connection with the main frame being at the rear ends of the links. The arrangement is such that when the shift-frame is lifted it is constrained to move rearwardly, the component a of the two forces shifting the frame parallel with the angular printing plane of the typefaces.

Each of the links 14 and 15 is so connected that the effective length thereof may be increased or diminished independently of all the other links. For this purpose, one end of each link is mounted upon an eccentric pivot, which is turnable to change the eccentricity thereof. In the present instance, the eccentric pivots connect the links with the main frame. As shown more particularly in Figure 5, the link 14; is connected to the main frame by a pivot 17 having an annular groove 19 intermediate its ends engaged by a set-screw 18, threaded through the main frame. Said screw prevents longitudinal movement of the pivot, while permitting rotation thereof, and it is turned by means of a hexagonal head 21, the link 14 being mounted on an eccentric portion 20 of the pivot, which is between the head 21 and the body 17 of the pivot. The pivot 26 which connects the link 15 with the main frame isjournaled in an opening in the main frame, and said pivot has an annular groove 28 engaged by a set-screw 27 to rotatably connect the same with the main frame. The pivot has an eccentric portion 25 which is received in an opening 24 in a rod or bar 23 connecting the links 15 at the opposite sides of the frame. The link 15 is journaled on a reduced portion of the rod or bar between the same and the adjacent side plate 10. hen either pivot 17 or 26 is turned, the eccentric portion thereof is shifted angularly, and the effective length of the link-device is changed, thus to move the shifting frame toward or from the typing system. The ends of the shift-frame may be simultaneously moved, or independently, to true the platen, and equalize the strength of the type-impressions throughout the typed line as may be desired. Thus the frame may be adjusted angularly, and it may be tilted forwardly or rearwardly by increasing or diminishing the effective length of the links 15, or the links 14.

Each of the end plates 13 of the carriage-sl1ift-frame has at its ends inwardly extending ears or lugs 29 and 33, and. rails 31, 32, in the form of channel members, are secured to the ears. Each of the rails is right angular in cross-section, and the rail 31 at the rear of the frame is adjustably connected with the ears by means of screws 30 which engage elongated slots in the rail. The forward rail 32 is riveted to the ears 33, and the carriage 34 has similarly shaped rails 34 which cooperate with the rails 31 and 32 to form races. The rails 34 are formed by bending up the front and rear edges of the base plate of the carriage, as shown, and each rail 34 has a bearing surface parallel with and spaced apart from a bearing surface of the adjacent fixed rail 31 or 32, as the case may be. A bearing truck is arranged between each pair of cooperating rails. The truck, which is a hollow body formed of sheet-metal, or the like, has j ournaled thereon a plurality of pairs of friction rollers 35, a pair being arranged at each end of each truck. Each of the rollers 35 is journaled in the truck, and the walls thereof are cut away, so that the periphery of each roller extends beyond the walls of the truck. The members of each pair of rollers have their axes 38 and 39 at right angles, as shown in Figures 6 and 7, and the rollers at one end of the truck are symmetrical with those at the other end.

Referring to Figures 1 and 3, it will be seen that the rails 34 are between rails 31 and 32, the arrangement being such that when the trucks are in place the carriage is locked in rolling engagement with the shiftframe, tlat is, the carriage may move freely longitud nally, but it cannot lift away from the shift-frame. The carriage is, however, easily released from the shift-frame by detaching he rail 31, which may be done by releasing the screws 30. Since the screws engage slots in the rail 31, said rail may be adjusted toward and from the rail 32 to provide the proper engagement between the rollers of the trucks and the rails. It will be seen, by referring to Figure 3, that each rail has a surface for engagement by each roller of a pair.

Mechanism 'is provided whereby each bearing truck may travel differentially with the carriage. Said mechanism includes a toothed wheel 40 which is jonrnaled, as indicated at 41, in an opening extending transversely of the truck, between the pairs of rollers. The plane of the toothed wheel is diagonal to the truck body, and the walls of the body are cut away, so that the wheel extends beyond both sides thereof. The lower edges of both rails 31 and 32 are pro vided with teeth, indicated at 42, and the free ends of the rails 34 have similar teeth indicated at 43. The series 42 and 43 of teeth at each side of the carriage'frame are directly opposite, and both series are engaged by the teeth of the wheel 40 of the adjacent truck. In an anti-friction roll and a ball-bearing truck of this character, the longitudinal movement of the truck and roll differentiates from the longitudinal movement of the carriage as the ratio of one to two. .Thus, the ratio of the diameter of the anti-friction rolls to the diameter of the truck-pinion will also be as the ratio of one to two. This arrangement prevents the possibility of the truck creeping out of proper relation with respect to the carriage-movement, when the carriage is violently thrown to the right hand. I

Referring to Figure 2, it will be seen that the teeth 42 are at the center of the rails, extending for a distance on each side of the center, the series occupying about one-third of the length of the rail. At the right-hand end. each rail is cut away to the depth of the teeth. This provides an easy method for removing the trucks. iiVhen the carriage is forced to the right, to the extreme of its movement in that direction, that is, to the 0 position of the scale. the toothed member 40 is just out of engagement with both series of teeth 42. By means of a rod or key pushed into raceways from the left of the machine, the trucks may be pushed out at the right-hand end, thus releasing the carriage from the shift-frame. It may also be released by detaching the rail 31. The arrangement provides for a ready interchange of carriages and platens. and for easy access to the carriage-feeding mechanism. ribbonvibrating mechanism, and other parts which are directly beneath the carriage.

The adjustable connection between the main frame and the carriage shift-frame permits an exact positioning of the carriage with respect to the segment, so that the platen printing line may be brought into coincidence with the printing plane of the type faces, and without the necessity for any change in the position of the segment.

By means of the adjustable rail 31 any tightness or looseness of the bearings between the carriage and the shift-frame may be eliminated. When the rail is detached, the carriage may be removed as a unit. This may also be accomplished by first removing the trucks, as above described, after which the carriage may be lifted bodily from the shift-frame.

Variations may be resorted to within the scope of the invention, and portions of the improvements may be used without others.

Having thus described my invention, I claim:

1. In a typewriting machine, a main frame, a carriage-shift-frame, pairs of swinging connections between the ends of the frames to constrain the shift-frame to move rearwardly as it is shifted upwardly, and means to increase or diminish the effective length of any of the connections.

2. In a. typewriting machine, a main frame, a carriage-shift-frame, pairs of swinging connections between the ends of the frames to constrain the shift-frame to move rearwardly as it is shifted upwardly, and means to increase or diminish the effective length of any of the connections, said connections including eccentric pivots on which the connections are mounted and turnable to change the eccentricity thereof.

3. In atypewriting machine having a carriage, a platen directly journaled thereon, a typing system tilted to hold the type-bars inclined rearwardly in printing position, a carriage-shift-frame, and obliquely-extend ing connections between the shift-frame and r the machine-frame for constraining the carriage to shift obliquely parallel with the plane of the type-faces in printing position, said connections being adjustable in effective length at either end of the shift-fran'ie to true the platen and thereby enable the platen printing line to be brought evenly into the printing plane of the type-faces, to equalize the strength of the type-impressions throughout the line of typing.

4. In a typewriting machine, the combination with amain frame and a carriage-shiftframe, of means connecting the shift-frame to float upon the main frame, and means for adjusting said connecting means to move the shift-frame forwardly or rearwardly at either side or to tilt said frame in either direction, said connecting means compris-- ing upper and lower pairs of substantially parallel arms at each end of the frames, each arm pivoted at its ends to the frames, one of the pivots of each arm eccentric and turnable to change the eccentricity thereof, and equalize the strength of the type-impressions throughout the line of typing.

5. In a typewriting machine, the combination with a main frame and a carriage-shiftframe, of upper and lower connections be tween the frames at each end thereof, each of said connections independently variable to true the carriage-shift-frame at either end.

6. In a typewriting machine having a typing system tilted to hold the type-bars inclined in printing position, a platen, a carriage on which the platen is directly journalled, a non-traveling carriage-shift-frame directly engaging and wholly supporting and wholly guiding said carriage and mountedto shift parallel with the printing plane of the type-faces, and means to independently adjust either end of the frame toward or from the typing system, to equalize the type impressions throughout the line of yp s- 7. In a typewriting machine embodying a main frame, a carriage, a platen journaled directly on the carriage, and pivoted type bars, the combination of a non-traveling shift-frame supporting said carriage for case shift movement, said non-traveling shiftframe having a pair of separated guidetracks directly engaging said carriage and forming its sole support and guide, and means for mounting said shift-frame together with said pair of tracks for bodily adjustment as a unit at either side relative to the main frame independent of the caseshift movement to obtain proper relation between the carriage and the type-bars.

8. In a typewriting machine embodying a platen, a main frame and a carriage upon which the platen is directly journaled, the combination of a set of nonshifting members adjustably fixed directly to the main frame for the purpose of truing the platen by setting an end thereof either forwardly or backwardly relatively to the other end thereof, and a carriage-guiding shift-frame element entirely carried and guided by said non-shifting adjustable members during the shifting operation and shiftable up and down with said carriage independently of said main frame, and also adjustable there: by either forwardly or backwardlyat either side of the machine relatively to the other side to true the platen.

9. In a typewriting machine embodying a platen, a main frame and a carriage upon which the platen is directly journaled, the combination of a set of non-shifting members adjustably fixed directly to the main frame for the purpose of truing the platen by setting an end thereof either forwardly "or backwardly relatively to the other end thereof, a carriage-guiding shift-frame element entirely carried and guided by said non-shifting members during the shifting operation and shiftable up and down with said carriage and platen independently of the main frame, and means for giving all of said members movement relative to the main frame for adjusting the shift-frame element at either side of the machine either forwardly or backwardly relatively to the other side.

10. In a typewriting machine embodying a main frame and a platen-carriage, the combination of a set of fixed members adjusjably carried by the main frame for the purpose of truing the platen by setting an end thereof either forwardly or back wardly relatively to the other end thereof, a shift-frame mechanism comprising a parallel link motion, and means effective during the shifting operation for entirely supporting and guiding said shift-frame mechanism to move as a unit on said adjustable fixed members.

11. In a typewriting machine embodying a platen, a main frame and a platen-carriage, the combination of a set of members ad justably carried by the main frame, a carriage-guiding shift-frame mechanism comprising a parallel link motion, means effective during the shifting operation for entirely supporting and guiding said shiftframe mechanism and carriage as a unit on the members, and means for truing the ends of the platen relatively to each other, in eluding means for moving said members at one side of the machine to adjust the position of the shift-frame mechanism at that side independently of the other side.

19.. In a typewriting machine embodying a main frame, a platen, a platen-carriage, and type bars having a limited movement to printing position, the combination of a carriage-guiding shift frame element, means for truing the ends of the platen relatively to each other, including a. set of members entirely supporting and guiding the shift fr'ame element during its carriage-shifting movements, and means for mounting said members for movement at either side of the machine relatively to the other side and at right angles to the type bar at the end of its movement to printing position.

13. In a. typewriting machine embodying a main frame, a platen, a carriage, and type bars having a limited movement to printing position, the combination of a carriageguiding shift frame element, means for truing the ends of the platen relatively to each other, including a set-of adjustable members entirely supporting and guiding the shift frame elementdnring its carriage-shifting movements, means for adjusting said members at either side of the machine relatively to the other side and at right angles to the type 'bar at the end of its movement to printing position. and means for retaining the parts in adjusted position.

14. In a typewriting machine embodying types, a platen, and a platen-carriage, the

combination of two rails on said carriage, a shift-frame entirely supporting the carriage, two co-operating rails thereon, means for adjusting one of the rails on'the shiftframe with relation to the other, and means for adjusting the shift-frame rails as a unit forwardly or backwardly at either end thereof independently of the other end thereof to true the platen with relation to the types, While preserving the parallelism of the rails to each other.

15. In a typewriting machine having a main frame and embodying type-bars and an abutment for limiting the movement of the type-bars to printing position, the combination of a carriage having case shift movement, a platen directly journaled on said carriage, non-traveling supports for said carriage, said supports forming part of a shift-frame having links whereby it floats upon the main frame of the machine, and means for mounting said links for adjustment of said shift-frame at either end, together with said carriage and platen as a unit, independently of the case shift movement, to afford type-impressions of equal strength throughout the line of typing, said shift-frame having tracks directly engaging and entirely supporting and guiding said platen-carriage.

16. In a typewriting machine embodying type bars which occupy an oblique position when at the printing point and an abutment for limiting the movement of said bars to such position, the combination of a carriage having case shift movement, supports there for, a platen supported by said carriage and means for mounting said supports for adj ustment as a unit in an oblique direction independent of the ease shift movement to afford full impressions of the type bars on the platen.

17. In a typewriting machine embodying type bars which occupy an oblique position when at the printing point and an abutment for limiting the movement of said bars to such position, the combination of a carriage, having case shift movement, supports therefor, a platen supported by said carriage, and means for adjusting said supports as a unit in an oblique direction independent of the ease shift movement to afford full impressions of the type bars on the platen.

18. In a typewriting machine, the combination of swinging type bars which occupy an oblique position when at the printing point, a platen mounted for case shift move ment, supports therefor, and means for mounting said supports on the main frame of the machine for adjustment as a unit in an oblique direction independent of the ease shift movement to afford full impressions of the type bars.

19. In a. twpewriting machine, the (MH- bination of swinging type bars which orcupy an oblique position when at the printing point, a platen mounted for case shift movement, supportstherefor, and means for adjusting said supports on the main frame of the machine as a unit in an oblique direction independent of the case shift movement to afford full impressions of the type bars.

20. In a typewriting machine, the com-,

bination of swinging type bars which occupy an oblique position when .at the printing point, a platen mounted for case shift movement, supports therefor, means for adjusting said supports on the main frame of the machine as a unit in an oblique direction independent of the case shift movement to afford full impressions of the type bars, and means for holding the supports in adjusted position.

2-1. In a typewriting machine having a platen, a carriage on which the platen is directly journaled, and typing instrumentalities, the combination with a main frame supporting said instrumentalities and a nontraveling shift-frame wholly supporting and wholly guiding said carriage, of a pair of arms pivoted on each end of said shiftframe and said main frame, one arm of each of said pairs being disposed above the other arm of its pair, and means for truing said platen by moving said shift-frame forwardly or baekwardly angularly at either end independently of the other with respect to said main frame, whereby the printing line of said platen may be brought into coincidence with said typing instrumentalities when the latter are in printing position, and the strength of the type-impressions equalized throughout the line. Y

22. In a typewriting machine having a platen and typing instrumentalities, the combination with a main frame supporting said instrumentalities and a shift-frame supporting said platen, of a pair of arms at each end of said shift-frame, one arm of each pair being disposed above the other and both arms of each pair being pivoted to said shiftframe, and means including an eccentric, adjustable pivot for fastening each of said arms to said main frame for truing said shift-frame angularly with respect to said main frame by changing the effectivelength of each of said arms at one end of said shift-frame, whereby the printing line of said platen may be brought into coincidence with the printing line of said typing instrumentalities when the latter are in printing position.

23. In a typewriting machine having a main frame and a shift-frame disposed between the sides of said main frame, in combination, a connecting arm having apertures adjacent both ends, the front end of said arm beingpivotally fastened to an end of said shift-frame adjacent the lower side thereof, the rear end of said arm being disposed on the inside of said main frame adjacent a rear corner thereof, a rotatable stubmember engaging in the aperture in the rear end of said arm, and a set screw in said main frame engaging in said groove for holding said pivot in its adjusted position, said shaft-member having a screw-driver slot in its outer end whereby said eccentric pivot may be conveniently adjusted from outside of said main frame.

- 24. In a typewriting machine embodying a main frame, a platen, a carriage to which the platen is directly journaled, and typebars having limited movement to printing position, the combination with a non-traveling shift frame having means directly and entirely guiding and supporting said carriage, of means for truing the platen relatively to the type-bars, including means at the sides of the main frame for adjusting said shift frame bodily as a unit together with the carriage and platen relatively to the main frame forwardly or backwardly at either side of said main frame, and at right angles to the type-bar at the end of its movement to printing position.

25. In a typewriting machine embodying a main frame, a platen, a carriage to which the platen is directly journaled, and typebars having a limited movement to printing,

position, the combination with a non-traveling carriage-guiding shift frame having track means directly'and entirely aiding and supporting said carriage, said shift frame being connected by platen-truing means to the sides of the main frame, for adjusting said shift frame as a unit together with the carriage and platen at either side of the main frame'and relatively thereto, forwardly or backwardly and at right angles to the type-bar at the end of its movement to printing position, and means at each side of the main frame for retaining the shift frame in adjusted position.

26. In a typewriting machine embodying a main frame, a platen and. a platen-carriage, the combination of platen-truing adjustable members at the sides of the main frame, and a non'-traveling carriage-guiding shift frame entirely carried and guided by said platen-truing members at the'shifting operation and also adjusted by said platentruing members and movable independently thereof, so as to shift said carriage at all such platen-truing adjustments, the shift frame being adjustable by means of said members at either side of the main frame.

27. In a typewriting machine embodying type-bars which occupy an oblique position when at the rinting point, and an abutment for limiting the movement of said bars to such position, the combination of a carriage having case-shift movement, carriageguiding supports therefor, a platen supported by said carriage, and platen-truing means at the sides of the main frame for adjusting said supports as a unit in an oblique direction either forwardly or backwardly at either side of the machine independly of the case-shift movement, to afford full impressions of the type-bars on the platen throughout the length of the line of typing and at all case-shift positions of the platen.

28. In a typewriting machine, the combination of swinging type-bars, a platen mounted for case-shift movement, platenguiding supports, platen-truing means for adjusting said supports on the main frame of the machine at either side thereof for- Wardly or backwardly as a unit in a direct line independently of the case-shift movement, to afford full impressions of the typebars throughout the line of typing and at all case-shift positions of the platen, and means at each side of the main frame for holding the supports in adjusted position independently of the other side of the main frame, whereby a readjustment can be effected at either side of the main frame While the adjustment at the other side is preserved.

ALFRED G. F. KUROWSKI. 

